28812808785 has 16 divisors (see below), whose sum is σ = 48812288256. Its totient is φ = 14462899968.

The previous prime is 28812808729. The next prime is 28812808789. The reversal of 28812808785 is 58780821882.

It is not a de Polignac number, because 28812808785 - 2⁹ = 28812808273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28812808789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56495449 + ... + 56495958.

It is an arithmetic number, because the mean of its divisors is an integer number (3050768016).

Almost surely, 2^28812808785 is an apocalyptic number.

It is an amenable number.

28812808785 is a deficient number, since it is larger than the sum of its proper divisors (19999479471).

28812808785 is a wasteful number, since it uses less digits than its factorization.

28812808785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112991432.

The product of its (nonzero) digits is 4587520, while the sum is 57.

The spelling of 28812808785 in words is "twenty-eight billion, eight hundred twelve million, eight hundred eight thousand, seven hundred eighty-five".